The Book on Government (Kitab Al-Imara)
Muslim :: Book 20 : Hadith 4724
It has been narrated (through another chain of transmitters) on the authority of Abu Huraira that the Messenger of Allah (may peace be upon him) said: When you travel (through a land) where there is plenty of vegetation, you should (go slow and) give the camels a chance to enjoy the benefit of the earth. When you travel (through a land) where there is scarcity of vegetation, you should hasten with them (so that you may be able to cross that land while your animals ore still in a good condition of health). When you make a halt for the night, avoid (doing so on) the road, for the tracks are the pathways of wild beasts or the abode of noxious little animals.